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Nikitich [7]
2 years ago
9

10pts Body Systems Interactions WebQuest Choose 7 out of the following 10 situations and use the Internet to research and write

an answer to the two questions. Remember to write the answers in your own words and to cite the sources of your information. Copying materials will result in a zero for the assignment. What two (or more) systems are involved in this process? How are they involved? Situations Playing a video game Getting energy to sit through class by eating cereal and a banana Going through puberty Touching a hot pan and yanking your hand away Jumping up and down Drinking water on a hot day Sneezing Blushing Hitting your head on the top of the car as you get into it Breathing harder during a jog For Example: Delivery of oxygen to the blood Answer: The respiratory system draws in oxygen-filled air from the environment through the nose and trachea to the lungs. In the tissues of the lungs, blood vessels cover the tiny air sacs called alveoli. Here, the oxygen is exchanged with the carbon dioxide being dumped by the blood. As part of the circulatory system, the heart pumps the blood to the lungs, and then to the rest of the body through arteries and veins, to deliver the oxygen to all the cells and pick up the carbon dioxide.
Chemistry
1 answer:
GuDViN [60]2 years ago
6 0
<span>systems are involved in this process, How are they involved? 
The way that you touching </span><span> a hot pan and yanking your hand away is your body saying that "Aye, This isn't right" and our nerves go to the source where you had touched the hot pan... sending the signals to your brain,  Your hand might have a small blister..the reason why that is, because its your bidy naturally healing its self with an internal wound</span>
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A 1.0-L buffer solution is 0.10 M in HF and 0.050 M in NaF. Which action destroys the buffer? (a) adding 0.050 mol of HCl (b) ad
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Answer:

(a) adding 0.050 mol of HCl

Explanation:

A buffer is defined as the mixture of a weak acid and its conjugate base -or vice versa-.

In the buffer:

1.0L × (0.10 mol / L) = 0.10 moles of HF -<em>Weak acid-</em>

1.0L × (0.050 mol / L) = 0.050 moles of NaF -<em>Conjugate base-</em>

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Thus:

<em>(a) adding 0.050 mol of HCl:</em> The addition of 0.050moles of HCl produce the reaction of 0.050 moles of NaF producing HF. That means after the reaction, all NaF is consumed and you will have in solution just the weak acid <em>destroying the buffer</em>.

(b) adding 0.050 mol of NaOH: The NaOH reacts with HF producing more NaF. Would be consumed just 0.050 moles of HF -remaining 0.050 moles of HF-. Thus, the buffer <em>wouldn't be destroyed</em>.

(c) adding 0.050 mol of NaF: The addition of conjugate base <em>doesn't destroy the buffer</em>

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